+if [[ -z "$TARGET" ]]; then
+ echo "FATAL: --target must be specified" >&2
+ exit 2
+elif [[ ! -d "$WORKSPACE/build/package-build-dockerfiles/$TARGET" ]]; then
+ echo "FATAL: unknown build target '$TARGET'" >&2
+ exit 2
+fi
+
+build_args+=(--target "$TARGET")
+
+if [[ -n "$ONLY_BUILD" ]]; then
+ build_args+=(--only-build "$ONLY_BUILD")
+fi
+
+if [[ -n "$FORCE_BUILD" ]]; then
+ build_args+=(--force-build)
+fi
+
+if [[ -n "$FORCE_TEST" ]]; then
+ build_args+=(--force-test)
+fi
+
+if [[ "$SKIP_DOCKER_BUILD" = 1 ]]; then
+ build_args+=(--skip-docker-build)
+fi
+
+if [[ -n "$ARCH" ]]; then
+ build_args+=(--arch "$ARCH")
+fi
+